Year	% of revenue
1990	0.5685545593702165
1991	0.6216505894962486
1992	0.6884681583476765
1993	0.6197946930079411
1994	0.877568493150685
1995	0.8801760352070414
1996	1.5098314606741574
1997	1.6228748068006182
1998	2.408137845131825
1999	1.761252446183953
2000	1.2060201335592544
2001	1.3442305624260673
2002	1.55206084900812
2003	1.4956872820701046
2004	4.976247955766685
2009	0.13934589398002317